E36 325i Very Rough Idle, Lost Braking ability, Bad Smell

1936 BMW 325
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DARWIN325I
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BMW E36 325i '92 198,000k 2.5L

My BMW is great to drive & I never thrash my machine, yet as soon as i started it the other day it immediatly started to idle eraticly & i almost have no brakes at all. The engine coughs & backfires, also engine compartment emmits a bad smell yet there is no visible signs upon inspection.

Ive heard VANOS unit, idle controll unit, ABS pump, ABS relay, EGR valve, oxygen sensor, defective coil pack or even a dirty idle controll.

What is the most likely problem i should expect this to be?
Apr 28, 2007 at 8:45 AM
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DARWIN325I
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Checked computer & coils. All are BOSCH branded, so they should be ok?
Apr 29, 2007 at 1:29 AM